Don't do this if you don't understand the risk.
No matter your level of experience in this hobby there is always a chance of being electrocuted. Safety must be your first priority and remember that rushing the work is the quickest way to electric shock. The goal is to reciece zero electric shocks in your lifetime. Did you know...
You can be injured or killed with as little as 30 Volts (VDC) potential. Vintage electronics average upwards of 500 VDC.
The shock danger remains for hours or even days. And it remains even after the gear has been unplugged from the wall!
In some guitar amplifiers, for example, there is a part commonly known as 'The Death Cap'.
Some generalities to keep in mind as you work. The items below are not a list of saftey rules in any way. They are generalities provided on an educational basis only. We feel you should be aware of these topic areas. They are recommendations for your thought and further research...
There are current and voltage limiting devices available that help reduce your risk. A common current limiter(lightbulb limiter) can be made at home with simple parts while voltage limiting is usual done through the use of a Variac which is a variable transformer